How long will a bid bond stay in effect?

[John]

Once we receive the bid bond, how long will the bond be effective if the bid date has been extended? Will we need to apply for a new bond?

[Riskwriter]

Good question, while there is not a set term in writing on the bid bond. Bid bonds should not be used if more than 30 days old.

It would be wise to have your surety agent issue a new one should your bid be postponed more than 30 days.

It also may depend on the bond form. A Federal form for example has the bid date right on the bond and would have to be reissued by your surety should there be any change in the bid date.
Basically, while they 'may' be good for 30 days, why take a chance on any technicality being used to toss out your bid. Ask your surety to reissue if the bid date is change more than a few days.